Happyjack or Torklift

Unless you plan on hauling a light camper, I also suggest the Torklift fame mounts. I feel they are better anchored and the fact that no drilling is required means you are not weakening your truck or allowing a point of corrosion.

Since they bolt up with no additional holes left behind, you can easily remove them and move them over to another vehicle (Fords are good for that) or resell them if you get a vehicle that requires a different fit.